A flat roof membrane system is being installed on a 10,000 square foot roof. The membrane comes in 10-foot wide rolls. If 6-inch side laps and 6-inch end laps are required, approximately how many linear feet of membrane are needed?
Correct Answer
C) 1,150 linear feet
Effective coverage per roll = 9.5 ft (10 ft - 0.5 ft lap). Length needed = 10,000 sq ft ÷ 9.5 ft = 1,053 linear feet. Adding for end laps and waste brings total to approximately 1,150 linear feet.
Why This Is the Correct Answer
Effective coverage per roll = 9.5 ft (10 ft - 0.5 ft lap). Length needed = 10,000 sq ft ÷ 9.5 ft = 1,053 linear feet. Adding for end laps and waste brings total to approximately 1,150 linear feet.
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